Clinical trials
Observational Study clinical trials
Below are recruiting observational study clinical trials, each written for real people, not researchers. We’re tracking 839 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT07223372Recruiting
Study on male hormone blocking drugs for prostate cancer in Australia
This study looks at how certain drugs (darolutamide, enzalutamide, apalutamide, or abiraterone) that block male hormones are used to treat men with prostate cancer that has spread. It aims to understand real-world treatment patterns in Australia.
Pymble, New South WalesAges 18 years+ - NCT07200726Recruiting
Brain inflammation and thinking after heart surgery
This study looks at whether brain inflammation during heart surgery may affect memory and thinking. It includes people aged 60 and older who are having planned heart surgery.
Genk, LimburgAges 60 years+ - NCT06849193Recruiting
Predicting treatment outcomes in advanced bile duct cancer
This study looks at how well current chemotherapy and immunotherapy work for advanced bile duct or gallbladder cancers that cannot be removed by surgery. Researchers will collect data from multiple centers to build a model that helps predict how patients may respond to treatment.
Nanjing, JiangsuAges 18 years+ - NCT07093801Recruiting
Study of lutetium-177-PSMA-617 for advanced prostate cancer
This study is observing how well the treatment lutetium-177-PSMA-617 works in people with metastatic castration-resistant prostate cancer. It aims to gather real-world information about its effectiveness and safety.
Alessandria, ALAges 18–99 - NCT07054229Recruiting
Microwave ablation for low-risk thyroid microcancer
This study looks at whether microwave ablation, a minimally invasive treatment, works as well as surgery for small, low-risk thyroid cancers. It uses special ultrasound and genetic tests to help decide the best treatment.
Guangzhou, GuangdongAges 18–70 - NCT06587854Recruiting
Study on fluid congestion in acute heart failure patients
This study looks at different patterns of fluid buildup in people with acute heart failure. It aims to understand how these patterns relate to treatment with water pills (diuretics) and may help improve care.
GroningenAges 18 years+ - NCT05539079Recruiting
Long-term study of MGUS and how it may change over time
This study follows people with MGUS (a blood condition that usually does not cause symptoms right away) to learn how it progresses over the long term. If you have MGUS or might have it, your results may help doctors understand risk and changes over time.
Oxford, OxfordshireAges 18 years+ - NCT07059286Enrolling by invitation
Pregnancy, Baby Brain Scans, and Child Development Study
This study looks at how a mother's health and experiences during pregnancy may affect her baby's brain growth and early development. You and your baby would have special MRI brain scans, fill out some questionnaires, and then your child's development would be followed until they are 6 years old.
Milan, MIAges 18 years+ - NCT06826820Recruiting
Fertility and infection study
This study looks at how infections and inflammation might affect fertility in women. It aims to better understand these connections to help improve treatment and care.
GrazAges 18 years+ - NCT06908980Recruiting
Predicting survival after gallbladder removal for infected gallbladder
This study is testing a tool to predict survival after gallbladder removal for people with acute cholecystitis caused by gallstones. By joining, you help doctors better assess risk and improve care for future patients.
Pavia, PaviaAges 18 years+ - NCT06654284Enrolling by invitation
Quality of life after ICD implant or battery change
This study looks at how people feel and live their daily lives after getting an ICD or having the battery changed. Researchers want to understand your quality of life over time.
LeuvenAges 18 years+ - NCT06776874Recruiting
Predicting risks after an ERCP procedure
This observational study looks at patients who need an ERCP (a scope procedure for the bile ducts, liver, or pancreas). The goal is to create a score that can predict side effects after the procedure, which may help doctors better manage care.
BolognaAges 18 years+ - NCT06628336Recruiting
Study of HARMONY Evolution hip replacement implants
This study looks at how well HARMONY Evolution implants and tools work for people getting a total hip replacement. It will help doctors understand if the implants are safe and effective over time.
BesançonAges 18–99 - NCT06642532Recruiting
Using ultrasound to check brain blood flow after skull repair
This study uses a special ultrasound test to see how blood flow in the brain changes after you have surgery to replace a piece of your skull with a PEEK implant. It may help doctors understand if the surgery affects blood flow.
Shanghai, Shanghai MunicipalityAges 18 years+ - NCT06607588Recruiting
Studying HIV drug resistance in Mozambique
This study looks for HIV drug resistance in people who have been on a specific first-line HIV medication (TLD) for at least 6 months and still have detectable virus. It aims to understand if resistance is developing so that better treatments can be planned.
ChokwéAges 18 years+ - NCT06949254Recruiting
Study of radiation and hormone therapy for high-risk prostate cancer
This study looks at combining stereotactic body radiation therapy (a precise type of radiation) with hormone therapy for men with high-risk prostate cancer that hasn't spread. The goal is to see how well this treatment works with fewer side effects.
Bergamo, BergamoAges 18 years+ - NCT06503367Recruiting
Observation study for children 0-5 with LAMA2 muscular dystrophy
This study follows young children with LAMA2-related congenital muscular dystrophy to learn more about the disease. It does not test a new treatment, so it may help families understand the condition better and prepare for future trials.
Los Angeles, CaliforniaAges Up to 5 years - NCT06464224Recruiting
Breathing effort patterns in patients coming off the ventilator
This study observes how your breathing effort changes as doctors try to remove you from the breathing machine (ventilator). It helps understand why some patients have trouble breathing on their own after being on the ventilator.
Rio de JaneiroAges 18 years+ - NCT06389552Recruiting
Long-term study of FOLFIRINOX after pancreatic cancer surgery
This study follows people with pancreatic cancer who are receiving a chemotherapy combination called FOLFIRINOX after surgery. The goal is to see how well the treatment works over time and how it affects long-term survival and cancer recurrence.
SeoulAges 19 years+ - NCT06334120Recruiting
Darolutamide safety study for men with prostate cancer in Korea
This study tracks the safety of the drug darolutamide in Korean men with a type of prostate cancer that has not spread (non-metastatic) or has spread (metastatic) and is still responding to hormone therapy. It aims to see how well patients tolerate the drug in real-world settings.
Multiple LocationsAges 19 years+ - NCT06119542Recruiting
GlycOrtho: Endothelial damage in major spine surgery
This study looks at how major spine surgery affects the inner lining of blood vessels. It measures a substance called syndecan-1 in the blood to understand this damage.
Bologna, BOAges 12–75 - NCT07723157Recruiting
Cesarean scar healing after first C-section
This study watches how a cesarean scar heals after a first-time C-section done after 26 weeks of pregnancy. It's an observational study—no treatments are tested—just careful tracking to learn more about recovery.
GdanskAges 18 years+ - NCT06148935Recruiting
Study of vericiguat in Korean heart failure patients
This study looks at how well Verquvo (vericiguat) works in daily life for Korean adults with chronic heart failure and a weak heart pump. It’s for people whose heart failure has recently gotten worse and who are starting Verquvo for the first time.
Multiple LocationsAges 19 years+ - NCT07699016Recruiting
Hemostatic agent use in heart and blood vessel surgery
This trial surveys surgeons about how they use hemostatic agents (medications that stop bleeding during surgery). It aims to understand current practices and improve patient safety.
Milan, MIAges 18 years+
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Common questions
- Are there clinical trials for observational study?
- Yes. Clin2 currently lists 839 recruiting observational study studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a observational study trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a observational study trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.